Pavement Ants & Driveway

[Bill]

I have a cement driveway which is about 7 years old.

Small ant hills and some weeds formed between the sections of cement and in a few of the cracks. I sprinkled poision down and they basically went away. What do I do after this?

Is there a way to seal those joints again? Will that prevents the ants & weeds from coming back?

Thanks

[Phisherman]

There is a concrete caulking you can use. If the cracks are larger than 1/4" then you will need some kind of backing.